Tiltable chair device



y 29, 1952 Q c. H. WILLETS 2,604,928

TILTABLE CHAIR DEVICE Filed Oct. 1, 1949 CHARFES "MW 52- 3 BY im e. M "ma f. m

ATTORNEYS Patented July 29, 1952 UNITED s TATE s --PAT E-NT :;,o FBI-CE I I m metic C AIR nEvIoE v Charles n; magfnbqtfl} Application October 1, 194si-iai N Claims; (01

The-iinvention relates to a tilt able chair do I vie-e and more particlarly relates to a chair iron of the yieldingtype. I v I object of this instant invention. is to provide a chair iron with a, springportion which is. adapted to.- normal 1y' retain the chair upon which theiron isinounted in a normal position but-which will permit the seat to, be tilted or rocked; H Y f :Another object of this invention is to provide. a chair iron which is slidab-ly mounted on the nether side of the seat of the chair so that 'itlmay] be positioned at various positions between the front and rear edge of the chairfseat so thatit can be adjusted to tilt pert-manor persons'of varying'w'eight. w 7

, y further object or this inve ntioniis 11:0 pro} 'v de a chair iron for mounting onflthefnether I idefgi the seat of the chair." between such [seat and 'thelegs which" slipportlthej seat; hereby the seat may be tilted relativejto the legsend rotated thereon."v j, p o I r, H. Still another object of this inventionji's Qto '"provide a chair seat iron including channeled members secured to the nether 'side'of thechair, a basefplate; slidably mounted in' the' cha'nnel -members and'a tilta'ble "spindle plateifseoured to; 'b utf'spaoed from "the base plate, there being spring means secured to the base plate and extending through the spindle plate'to normally retain the two; plates in substantial 'pa'rallel relationship but 'yieldable 'whereby 'th base "plate imaybe pivotal with respect tothespindle plate. Another and frurther i objectand advantage of the" invention will become more readily apparent from a study of the following description and drawings wherein: Fig; -1 is a side elevation of the preferred enibod-iment of thechair iron, 7 v

' is a rear ;elevation"of the constructionjshowrr' in figkl 'illustrating the device'on achair "g.* 3=i's'a vertical sectional viewpartlyin "elevation showing the preferred relationship of the spindleycollar, and hub'which tation of the'chair iron, and 'f 4 Fig. is afragmentary view showing the man,- ner in 'which'the legs-are attached to the hub. 'lnfliigp2" the channel members 3; are shown secured to the nether side 4; of a chair seaty 5. i d b lfitt Within the mo e 1. 1 h? channelrmembersfi is the base plate so: the chair iron Secured to the base plate 8 and downwardly therefrom are the support arms 8 permits roto which ispivo'tally secured at .lu the'fspindle slot 34 to lock se i l ii f- 6ib -t i i h i misifi j plate is normally substantially parallel tothe base plates and is spacqinieferrm i the xew ng -n, I The spindle plate; l

downwardly vertically "Extending spindl lgwhich isseciirediiii the sonar retina hub H towhich the chair1egs'l5 re connected.

{Th collar I3 s? threadedlyf connected to, :the

spindlevylz' and provided with a greater-e? on its outerperiphery lljadjac'ent the lower r d/l8 thereof. The collar 13 may be. rotatablyi mounted in hub by" means of'the"g'enera1l'y cylindrical were meme n n xin th ding ,itaiigentially in tine" grbty'e x Only o'l'likeyidis shown utitjw'i11pegy1qent that a' secori'ds'imil'ar hey may be 'si'n'iilarlyf v inserted throlig lie opposite side ibffhublf 2H into X enga em ,t [with the op osite side; or; gf ove' Hi we ,balancelfthe rotary support of C011ar 13 if1 hub"l4. I Itlwill also be-understoodthat any other suitable means may be employed: to provide rotatable support rfp ifl e 9 ???i 'h bj-W I! 1 gs dleflz i'sprovidd 'With'a' longitudinal ey slot 34 A} set screw :341 is screwed 'th oug'n a suitable hole in collar" Iajandiprojectsjintbjkey 'collar l3-faainst rotation rela- Ttive to spindle l2. Alhol'e'35 is'provided1inhub t l v .removed- "Screw r34 'is 'mad'e to jaj le'ngthjsuch that when it' is screwed down into I key} $1 534 M through which screwf'i'll rnaybe inserted o r its 'outer'end will notinte'rfere withthefrelative rotation between collar [3 and hub ured b' hi i spi dl l e I I, as bywe d n are the "tubularf; ho'iisings' 23' of jgeneral1yfova1 ,crosss'ecti'on which" have oneend in abutting relationship, as at '24 with'thebaseplatet with the other end extendin'gfbelow I the plane] of. the

spindle plate-H andterminating at a point $uoh 'as at '25; S'e'cured to, the base. plate 8" adjacent housing" 23* is on end: 26 "oft'he spring'fl; FThe housing'23.' h p v The spring 21 serves to retain thebaseplate and the seat offthe ychair whichfis adjusta'bly mounted on the base plate in a. normal position but such springswill of course bejyieldab1e to perm-it tilting'of "the chair's'eat as desired: The

connection betweenthe base plate and the 5 1;;-

spring 2 b in is 9 the ba ib at. 11 6 to the pinf29 inthe housing: 23 forms a' r'e'sil'eht returns to normal position, the spring .wil i zeo ites dle plate, so that when the base plate and the chair seat are tilted with respect to the spindle plate II the spring tends to urge the base plate to its normal position.

In order to accommodate persons of varying weight it is desirable that the chair iron be adjustable so that it can be positioned fore and aft of the chair seat on which it is mounted. To this end, the-bracket 30,may be secured to the chair seat and is arranged to rotatably support the threaded shaft 3| which is threadedly connected by means of a lug 32 rear of base plate 8. Rotation of efiects relative movement between the chair seatand the base plate, including-the remainingconnected assembly. The threaded connection be-' tween the shaft 3|, lug 32 and bracket -3B1serves to retain the chair seat in such relative position welded to the:

the shaft 3| 4 by reason of the rotatable connection between the hub and collar previously described herein.

While any suitable number of spring may be provided, it has been found that two serve the purpose quite well as shown in the drawings. The device can be made in various sizes to be adapted. to various size chair seats without departing from the scope of this invention.

Broadly; the invention icontemplates an improved chair iron-construction;

What is claimed is: -1. A chair seat having a seat iron comprising channel members secured to the nether side of thechair seat, a base plate slidably fitting in said channels, a screw rotatably secured to said chair "seat and 'threadedly connected to said base plate with respect to said base plate and connected assembly. A V-shaped notch Ila is providedin the center of the'rear edge of spindle plate [I to provide clearance'for lug 32 when thechair seat is tilted rearwardly. 1

In order to disconnect hub-"l4--and legs 15 from spindle l2, keys will bewithdrawn from openings 2!, thereby releasing th'eflconnection between the hub and collar 13. The hub and attached'legs may then simply be withdrawn over the lower end of the-spindle. To regulate the elevation of the-chair seat relative-to hub I4, screw will be backed out of key'slc'itiil sufl'iciently to permit the outer end of the screw to enter hole -35, thereby locking collar'13 to 'hub 14. By then rotating {the chair seat, spindle [2 will move up 'or down as desired in'collar l3.

When the desired'elevation is attained-screw will be screwed backinto key sl'ot 34' surfijciently to clear the inner periphery of 'hub 'Hi The chair seat may then swivel freelyflin hub 14 without any furtherchange inelevation ofthe seat. I

In order to regulate the'degreeoi tilting per- 'n'iissible with the chair iron, suitable stops in the form of the elongated screw'siii are' larranged in the spindle plate ll. If a larg'e degreefof-tiltis desired, such screws will, of course; be rotated to providethe maximum amount'of clearance between the nether side of'thechair seat and the ends 31 of the screws 36. On the other hand, if. asmall degree of tiltis desired, the" clearance between theends 31 and the nether side of the chair seat will bediminished'a'ccordmgm a While it is believed thatthe operation and construction of the invention is apparentby' reason of the foregoing, by way of amplification and illustration, it will be assumed thatgthe device is to be mounted on anether side offaflc'h'air seat in Fig. 2 of'the drawings; .Whenjthefchaifis being used in a normal sittini'g' pos'iti'omthe base plate 8 and spindleplate' H, willfbe substantially parallel and are resiliently retained m; thepositibn byv reason of the springs 21 being" connected in the base plate and 'adjacen'tto end v2 5 ofth'e housing 23 which is spaced from the point of pivot 10 of the baseplate 8 with respect'to the spindle plate ll. As the chair seatis tiltedIthe base plate 8 will of course pivotlwith respect to the spindle plate ll about-the] pivotal.,.connection no; Whilethe sprin is. being. stretchedhurihg such pivotingor rocking action, thespr'ing will remain stretched so that when. the base plate again realignsuch plate and the spindlelplat'e ljl Als'o the chair seat may be rotated in a complete circle so that said chair seat can be moved relatively to the base plate, support arms secured to one side of said base plate and extending downwardly therefrom, a spindle support plate pivotally secured to said arms, a threaded spindle secured to and extending vertically downward from said spindle plate, a collar threaded on said spindle, a hub mounted around and secured to said collar, housing means abutting said base plate, secured tosaid spindle-plate and extending therethrough and spring means secured at one end of said housing and at the opposite end of said housing to said base plate whereby said springs tend to retain said baseplateand spindle" plate in parallel to saidspindle plate and abutting saidbas plate efend' of said sup ort. means and terminatg,. ata,point' spaced downwardly from sai'dspindle. 'platelat. the other. jlend of lsaidl'support Imeans, 'spring.,m'eans stretched from said base plate-adijacent the point of 'abuttingIreIationship of said support means to the end ofisaidisupportmeans spaced downwardly irornsaid'f spindle plate, said spring means actingto normallyretainsaid-base plate and connected :chair seat insubstantially parallel relationsh p w th. said spindle; plate, but yieldable as the chair seatisy-tilted to a'ccommodate the weight of a person sitting (an-the: chair seat. v

3. A chair seat having a seat iron comprising. channel members mountedyonthe nether side of the chair seat, a baseplate slidably mounted therein, means to retain said channels atpredetermined positions along said baseplate, a spindle support plate pivotally secured to, but spaced from said base plate, said base .plate and spindle plate normally maintaining a. substantially. parallel relationship, spring support means secured to said spindle plate and abuttingfsaid base plate at one end of said support meansandterminating; at a point spaced downwardly-from. said spindle plate at thefiother ehd' oiTsaid support means, spring means stretched from said base plate adjacent the point -of abutting relationship oi said support means to the end of said support means spaced: from said'spindleflplate, said spring means actingto normally retain said' base plate and connected chair seat in substantially parallel relationship with'saidspindle plate, but yieldable as the chair seat is tilted to accommodate the weight of a person sitting on the chair seat, and additional means for rotatably connecting the chair iron to the legs of the chair seat, said means including, a spindle extending vertically down from said spindle plate, a collar threaded on said spindle, and a hub mounted on said collar.

4, A chair seat having a seat iron comprising, channel members mounted on the neather side of the chair seat, a base plate slidably mounted therein, means to retain said channels at predetermined positions along said base plate, said means including a bolt rotatably secured to the chair seat and threadedly connected to said base plate, a spindle support plate pivotally secured to, but spaced from said base plate, said base plate and spindle plate normally maintaining a substantially parallel relationship, spring support means secured to said spindle plate and abutting said base plate at one end of said support means and terminating at a point. spaced downwardly from said spindle plate at the other end of said support means, spring means stretched from said base plate adjacent the point of abutting relationship of said support means to the end of said support means spaced from said spindle plate, said spring means acting to normally retain said base plate and connected chair seat in substantially parallel relationship with said spindle plate, but yieldable as the chair seat is tilted to accommodate the weight of a person sitting on the chair seat.

5. A chair seat having a seat iron comprising, channel members mounted on the nether side of the chair seat, a base plate slidably mounted therein, means to retain said channels at predetermined positions along said base plate, said means including a bolt rotatably secured to the chair seat'and threadedly connected to said base plate, a spindle support plate pivotally secured to, but spaced from said base plate, said base plate and spindle plate normally maintaining a substantially parallel relationship, spring support means secured to said spindle plate and abutting said base plate at one end of said support means and terminating at a point spaced downwardly from said spindle plate at the other end of said support means, spring means stretched from said base plate adjacent the point of abutting relationship of said support means to the end of said support means spaced from said spindle plate,

said spring means acting to normally retain said base plate and connected chair seat in substantially parallel relationship with said spindle plate, but yieldable as the chair seat is tilted to accommodate the weight of a person sitting on the chair seat, and additional means for rotatably connecting the chair iron to the legs of the chair seat, said means including, a spindle extending vertically down from said spindle plate, a collar threaded on said spindle, and a hub mounted on said collar.

CHARLES H. WILLETS.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 96,548 Chase Nov. 9, 1869 2,184,988 Collier Dec. 26, 1939 2,471,024 Cramer May 24, 1949 

